126 lines
3.7 KiB
Diff
126 lines
3.7 KiB
Diff
From: Dmitry Fleytman <dmitry@daynix.com>
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Date: Thu, 16 Feb 2017 14:29:32 +0200
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Subject: [PATCH] eth: Extend vlan stripping functions
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Make VLAN stripping functions return number of bytes
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copied to given Ethernet header buffer.
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This information should be used to re-compose
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packet IOV after VLAN stripping.
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Cc: qemu-stable@nongnu.org
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Signed-off-by: Dmitry Fleytman <dmitry@daynix.com>
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Signed-off-by: Jason Wang <jasowang@redhat.com>
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(cherry picked from commit 566342c3125ac2e73abd36c650222318164517ed)
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---
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include/net/eth.h | 4 ++--
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net/eth.c | 25 ++++++++++++++-----------
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2 files changed, 16 insertions(+), 13 deletions(-)
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diff --git a/include/net/eth.h b/include/net/eth.h
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index 2013175857..afeb45be34 100644
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--- a/include/net/eth.h
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+++ b/include/net/eth.h
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@@ -331,12 +331,12 @@ eth_get_pkt_tci(const void *p)
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}
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}
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-bool
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+size_t
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eth_strip_vlan(const struct iovec *iov, int iovcnt, size_t iovoff,
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uint8_t *new_ehdr_buf,
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uint16_t *payload_offset, uint16_t *tci);
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-bool
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+size_t
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eth_strip_vlan_ex(const struct iovec *iov, int iovcnt, size_t iovoff,
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uint16_t vet, uint8_t *new_ehdr_buf,
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uint16_t *payload_offset, uint16_t *tci);
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diff --git a/net/eth.c b/net/eth.c
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index df81efb676..5b9ba26a56 100644
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--- a/net/eth.c
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+++ b/net/eth.c
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@@ -232,7 +232,7 @@ void eth_get_protocols(const struct iovec *iov, int iovcnt,
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}
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}
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-bool
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+size_t
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eth_strip_vlan(const struct iovec *iov, int iovcnt, size_t iovoff,
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uint8_t *new_ehdr_buf,
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uint16_t *payload_offset, uint16_t *tci)
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@@ -244,7 +244,7 @@ eth_strip_vlan(const struct iovec *iov, int iovcnt, size_t iovoff,
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new_ehdr, sizeof(*new_ehdr));
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if (copied < sizeof(*new_ehdr)) {
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- return false;
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+ return 0;
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}
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switch (be16_to_cpu(new_ehdr->h_proto)) {
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@@ -254,7 +254,7 @@ eth_strip_vlan(const struct iovec *iov, int iovcnt, size_t iovoff,
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&vlan_hdr, sizeof(vlan_hdr));
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if (copied < sizeof(vlan_hdr)) {
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- return false;
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+ return 0;
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}
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new_ehdr->h_proto = vlan_hdr.h_proto;
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@@ -268,18 +268,21 @@ eth_strip_vlan(const struct iovec *iov, int iovcnt, size_t iovoff,
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PKT_GET_VLAN_HDR(new_ehdr), sizeof(vlan_hdr));
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if (copied < sizeof(vlan_hdr)) {
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- return false;
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+ return 0;
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}
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*payload_offset += sizeof(vlan_hdr);
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+
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+ return sizeof(struct eth_header) + sizeof(struct vlan_header);
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+ } else {
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+ return sizeof(struct eth_header);
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}
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- return true;
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default:
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- return false;
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+ return 0;
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}
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}
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-bool
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+size_t
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eth_strip_vlan_ex(const struct iovec *iov, int iovcnt, size_t iovoff,
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uint16_t vet, uint8_t *new_ehdr_buf,
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uint16_t *payload_offset, uint16_t *tci)
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@@ -291,7 +294,7 @@ eth_strip_vlan_ex(const struct iovec *iov, int iovcnt, size_t iovoff,
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new_ehdr, sizeof(*new_ehdr));
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if (copied < sizeof(*new_ehdr)) {
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- return false;
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+ return 0;
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}
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if (be16_to_cpu(new_ehdr->h_proto) == vet) {
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@@ -299,17 +302,17 @@ eth_strip_vlan_ex(const struct iovec *iov, int iovcnt, size_t iovoff,
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&vlan_hdr, sizeof(vlan_hdr));
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if (copied < sizeof(vlan_hdr)) {
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- return false;
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+ return 0;
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}
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new_ehdr->h_proto = vlan_hdr.h_proto;
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*tci = be16_to_cpu(vlan_hdr.h_tci);
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*payload_offset = iovoff + sizeof(*new_ehdr) + sizeof(vlan_hdr);
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- return true;
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+ return sizeof(struct eth_header);
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}
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- return false;
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+ return 0;
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}
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void
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